Turbo-pneumatic drill.



J. W. SMITH.

TURBO PNBUMATIU DRILL.

- APPLICATION FILED JAN. 14. 1908.

910,428. Patented Jan. 19, 1909.

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TURBO PNEUMATIC DRILL.

APPLICATION FILED JAN. 14, 190B.

Patented Jan. 19, 1909.

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J. W. SMITH.

TURBO PNEUMATIC DRILL.

APPLICATION FILED JAN.14,19OB.

91 O, 428 Patented Jan. 19, 1909.

5 BHEETS-BHEBT 3- J. W. SMITH.

TURBO PNEUMATIC DRILL.

APPLICATION FILED 11111.14, 190B.

91 0,428. Patented J an. 15). 1909v 5 SHEETSSHEIJT 4.

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TURBO PNEUMATIC DRILL.

APPLICATION FILED JAN. 1-1, 1908.

91 0,428 Patented J an. 19, 1909.

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as?! WWW W JOHN W. SMITH, OF PHILADELPHIA, PElN'NSYLVANIAv TURB O-PNE UMATIC DRIIIL.

Specification of Letters Patent.

Patented Jan. 19, 1909.

Application filed January 14, 1908. Serial No. 410,760.

T all whom it may concern:

Be it known that I, JHHN W. Burnt, a citizen of the United States, residing in the city and county of Philadelphia, btate of Pennsylvania, have invented a new and useful Turbo-Pneumatic Drill, of which the following is a specification.

In the application of the turbine to port" able pneumatic drills, the great amount. of energy stored up in the rotor must be earefully considered and some means employed for quickly bringing the rotor to rest after the work has been performed. It is also essential that some means be employed for permitting the rotation of the rotor in ease the drill or other working tool sticks in the work. It is also essential that the statorby means of which the motive fluid is impinged against the buckets. maintain a close clean anee with the rotor and I have found in practice that this can be eiieetually accomplished by cn'iploying a complete stator inserted in such a manner that it can be easily renewed and at the same time reestablish the original clearance.

To the above ends my present invention comprises a novel construction of a turbo pneumatic drill comprising, in a simplified form. a rotor, a detachable stator for intpinging the motive iiuid. and speed changing mechanism.

My inventioi'i further consists of a novel con truction at a drill comprising a detachable stator i'ir impinging the motive tlnid against the buckets on the rotor. and a novel ct'instruction of speed changingmechanism.

It further consists of a novel construction of automatic braking mechanism co-actin g with the rotor.

It further ronsi-iis oi a novel construction of speed changing mechanism in conjunction with \Yltltlt :1 nine! construction 01. t1 l ll d lll clutch is tlliplti it'tl.

It 'tnrthcr ci'msists of a novel construction oi a hearing bracke in "which the power shaft mounted in a novel manner.

it further ronsists of other novel features of wnstrnetirm. ail as will be hereinafter all}; set. forth For the iurpose oi illu trating my invention I ha e shown in the acconi mnying tlirfitlllif. too i'oi'm th reof, since this ('fillbodiiuent hwbeen found ill practi e to give sati t'artory and reliable results. aithough it is to be wider-stood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the exact arrangement and organization of these instrumentalities as herein shown.

Figure 1 represents a sectional elevation of a. pneumatic drill embodying my invention. Fig. 2 represents a top plan view partly in section. Fig. 3 represents a section on line a' a', Fig. 2, showing the exhaust passages. Fig. 4 represents a top plan view of the feed head. Fi 5 represents a. sectional view of Fig. 4. I 1g. (3 represents a section on lines o--- .-,r Fig. i. Fig. 7 represents a top plan view of the friction ring. Fig. 8 represents a side elevation, partly in section, of Fig. Fig. 9 represents a sectional elevation, showing more clearly the. speed changing mechanism and the friction clutch. Fig. 10 represents a side elevation of the idler pinion seen in Fig. 9. Fig. 11 represents a plan view of Fig. 10.

Similar numerals of reference indicate eorrcspomiing parts in the figures.

Referring to the i lrawings:'ll1e easing of the drill. may have any desired form or contour and in the present. instance coinprises a body portion 1, to which is secured in any suitable manner, the upper casing member 2. which forms the feed head, and the lower casing member 3.

In order to more clearly describe my invention I will describe in sequence the stator. the. rotor and its adjuncts. the speed rhanging mechanism and friction clutch, and the automatic braking mechanism for the rotor.

The casing is provided with a chamber 4 in which the stator is secured. said stator comprising in the prcsent instance a channeled member 5 which forms, with the inserted member 13. channels for the passage of the motive lluid. The member 5 is provided at its inner end with flanges 7 which engage the inner end of easing 1.

ti designates a fastening device such as a. screw or eipiimlcnt device which is loose in the casing i. but has threaded engagement. with the members 5 and (i of the stator, whereby the stator is properly +senibled at all times with respect to the parts co-acting therewith.

As will be understood from Fig. 2. the motive fluid enters through the handle (not shown) which is at hed to the boss 9 and lit) passes, by means of passage 10 and port 11, to the channel 1; of the stator and impinges against the buckets 1; carried by the rotor 14, thence rearwardly through channel 15, forwardly through channel 115, against buckets 13, then rearwardly through chamber 18, impinging against the buckets l3, and then rearwardty through passage 19,forvardly through passage 20 and impinging against the buckets 13.

The motive fluid passes from the rotor through exhaust passages 21, as seen in Figs. 1, 2 and 3 into the atmosphere.

The rotor 14 is secured by means of the screws 2'2 to the power shaft 23, which is mounted in a bearing bracket 24 secured in any desired manner-to a lag or boss 25, it being noted that said bracket extends through the division member 26. The power shaft 23 is provided near each end, with an annular groove 27, which forms, vv h the bearing ring 28, carried by said bracket, a ball race for the balls 29.

30 designates a washer.

31 designates ,a pinion carried by the power shaft 23 and meshing with the gear 32 of the speed changing mechanism. This gear 32 is provided with an annular chain her in which is adapted to be located the friction ring 33 of the idler pinion 34.

35 designates a washer composed of fiber or any suitable friction material, and 3G designates a similar friction washer which engages the opposite side of the friction ring 33.

3t designates a friction disk to which the pins 35 are secured, said pins extending through the apertured free ends of the springs 39, the otherends of which are se- ,cured by screws or equivalent fastening devices 40 to the web of the gear 32.

The idler pinion 34 is provided near each end with a suitable groove, therebyadapt'tn'g the same for ball bearings 41, the inner of which is seated in an extension of the casing member 26 while the other is suitably carried by the casing members 1 and 3.

-12 designates the gear spindle which meshes with the idler 31 and against which the thrust ball bearing 43 abuts, it being noted that the gear portion of the spindle is recessed for this purpose.

The spindle portion of the gear spindle 42 is mounted in the journal bushing 41 which is carricd by the casing member 3.

l5 dedgnatcs the tool socket which is maintained in position by means of the nut H3.

1 will now describe the automatic brake for the rotor.

47 designates a friction ring provided with an annular groove =18 in which a strip of suitable frictional material -19 is secured by fastening devices 50.

:31 designates upwardly extending arms having at their upper ends apertured lugs 12, to which the pistons as are secured by means of fastening devices 51.

The pistons {1-1 are mounted in piston chambers 55 in the feed head 2 and the springs 57 abut against the lugs .32 to maintain the pistons at their innermost position and thereby cause the engagement of the friction material it) with the rotor 14, it being seen that the springs 57 are properly confined by the chambered nuts .38 against which they abut. As will be understood by reference to Figs. 1, 2,1, and t3, the motive fluid may pass from the passage It) through port so and passage tit'J into passage tit and thence through ports 02 and o l into the piston chambers .35.

61 designates the feed sci-cw which may be of any usual or conventional construction.

In order to provide for the proper lubrication of the drill at all times, an oil hole plug 65 has threaded or other engagement with the niain casing l, whcrcby grease or other lubricant may be placed within the drill, it being noted that lln' casing member 3 and the journal bu hing l! are apcrtured as seen at t'iti and that the gear spindle -12 is provided with a groove or aperture ()7 communicating therewith, whereby the neces ary lubrication of the spindle is assured.

The operation will now be readily ap arcnt: As soon as the motive hold is permitted to enter the pa sage t it will pass through port :19, pa. gun on and U1 and ports 62 and 6; into i isto'i chambers as and cause the pistons .3 therein to be raised against the tension ol the springs QT, thereby causing the friction trip il to be raised out of engagement with the rotor ll. The mo tive fluid impinge. against the buckets 13 and exhausts through pwaigcs 21. The rotor ,l-lby means of the power sha ft 723 and pinion 31 causes he gear I of the trans mission or speed changing mechanism to rotate, thereby ac' uating the idler 31. which is frictioually driven thereby and whi h drives the gear spindle in which the tool socket s mounted. In case tlu drill or other working lool should rill k it will be apparent that owing to thc pl'oii llui of the friction lutch in the sp wil cn imlng mechanism. the rot r may rc-molvc uh he drill spindle l'tllttlll-S slaiiouarv. rcl'y rendering practical bc application l the turbine to a portab e drill. won as the motive fluid is shut oil' he pring muse the friction strip ill ot the automatic frica. pinion having a flange engaging said having a friction drive, and my claims for 2 these features are to be interpreted with corresponding scope. I

It will now be apparent to those skilled in the art that I have devised a novel and i useful construction of a pneumatic drill, which embodies the features of advantage enumerated as desirable in the statement of l invention and the above description and while I have shown a preferred embodiment thereof which gives good results in practice, it is to be understood that the same is susceptible of modification in various p articulars without departing from the spirit; and scope of the invention or sacrificing any of its advantages.

Having thus described my invention, what f I claim as new and desire to secure by Letters Patent. is:

I. In a ncumatic drill. a casing. a rotor having tar ine buckets therein. speed changin: mechanism for said rotor. and a detachable stator provided with channels for redirecting motive fluid against said buckets.

2. In a nenmatic drill. a casing. a rotor having to! iue buckets therein, speed changing mechanism liming a friction clutch an automatic brake for said rotor. and means for impinging the motive fluid against the rotor.

3. In a pneumatic drill. a casing. a rotor having turbine buckets therein. pistons actuated by the motive fluid for releasing said rotor, speed changing mechanism having a friction clutch, and a stator.

4. In a pneumatic drill, a casing. a rotor therein. speed changing mechanism for said rotor. means for impinging the motive fluid against the rotor, aIC an automatic brake for said rotor.

5. In a pneumatic rill, a casing, a rotor therein, a power shaft, ball bearings there for. a gear driven by said shaft, on idler pinion frictionally driven by said qear, a spindle actuated by said pinion, and a detachable stator for said rotor.

6. In a pneumatic drill, a casing, a rotor therein, a power shaft for said rotor, a gear driven by said shaft, a pinion having a flange in frictional engagement with said gear, a gear spindle actuated by said pinion, and a stator for said rotor.

7. In a pneumatic drill. a casing, a rotor therein. a power shaft for said rotor, a gear driven by said shaft and having a chamber, a pinion having a flange engaging said chamber, a friction disk. yielding means for causing said disk to engage said flange, a gear spindle driven by said pinion, and a detachable stator for said rotor.

8. In a pneumatic drill, a casing, a rotor therein. a power shaft for said rotor, a gear driven by said shaftnnd having a chamber,

chamber, a friction disk, i yielding means carried by said gear for causin said disk to engage said flange, a gear 5 inc 1e driven by said pinion, and a detachab e stator for and rotor.

9. In a pneumatic drill, a casing, a rotor therein, a power shaft for said rotor, a ear driven by said shaft and having a cham er, a pinion mounted in ball bearings, having a flange engaging said chamber, a friction disk, yielding means for causing said disk to engage said flange, a gear s indle driven by said pinion, and a detacha le stator for said rotor.

10. In a pneumatic drill. a casin a rotor therein. a gear spindle, a thrust ball bearing between said rotor and spindle, speed changing mechanism co-acting with said rotor, and ear spindle, and a stator for said rotor detac ably carried by said casing.

11. In a pneumatic drill, a casing, a bearing bracket therein. a power shaft mounted t in said bracket, a rotor secured to said shaft,

a gear spindle, speed chat ing mechanism intermediate said shaft an spindle, and a detachable stator for said rotor.

12. In a pneumatic drill, a casing, a hearing bracket therein, a power shaft mounted in said bracket, a rotor secured to said shaft, :1 gear spindle, speed chan ing mechanism intermediate said shaft and spindle, a detachable stator for said rotor and a fluid actuated brake for said rotor.

13. In a pneumatic drill, a casing, a rotor therein, speed changing mechanism for said rotor, a detachable stator, a friction ring, friction material carried thereby and coaeting with said rotor, pistons connected with said ring, and {means for permitting motive fluid to actuate said pistons to raise said ring.

14. In a pneumatic drill, a casing, a rotor therein, speed changing mechanism for said rotor, at detiachable stator, a friction ring, friction material carried thereby and co acting with said rotor, pistons connected with said ring, yielding means for moving said pistons in one direction, and means for ertmtting motive fluid to move said pistons In the opposite direction.

15. In a pneumatic drill, a casing, a rotor with buckets therein, a. detachable stator for said rotor, speed changing mechanism for said rotor, a friction ring, friction material secured thereto, pistons connected with said rings, sprin co-acting with said pistons to cause said riction material to engage said rotor, and passages for leading motive fluid to said pistons to move them in the opposite direction.

16. In a pneumatic drill, a casing, a rotor with buckets therein, a detachable stator for said rotor, speed changingmechanism for said rotor includi a friction clutch, a friction ring, frictlon material 5 thereto, pistons connected with said rings,

springs co-acting With said pistons to cause said friction material to engage said rotor and passages for leading motive fluid to said pistons to move them in the opposite direction.

17. In a pneumatic drill, a casing, a rotor with buckets therein, means for impinging the motive iiuid against the rotor speed changing mechanism for said rotor, at friction ring, friction material secured thereto, pistons connected with said rings, springs co-acting with said pistons to cause said friction material to engage said rotor, and passages for leading motive fluid to said pistons to move them in the opposite direction.

18. In a pneumatic drill, a casing, a bearing bracket therein, a rotor, 21 power shaft therefor and mounted in a plurality of ball bearings carried by said bracket, speed changing mechanism for said shaft, an automatic brake for said rotor, and a detachable stator in proximity to said rotor.

JOHN W. SMITH.

C. D. MGVAY. 

